feat: simplify and return raw pointer

engine/include/engine/components/batch.h

@@ -29,7 +29,7 @@ private:
     unsigned int m_instance_count { 0 };
 
     // TODO: use static draw when possible
-    std::unique_ptr<OpenGL::InstanceBuffer> m_instanceBuffer = nullptr;
+    OpenGL::InstanceBuffer* m_instanceBuffer = nullptr;
 private:
     friend class Renderer;
     void prepare(glm::mat4 *instances, unsigned int count);

engine/include/engine/renderer/texture.h

@@ -8,7 +8,7 @@ namespace Core {
 class Texture {
 public:
     Texture() : m_id(0) {}
-    static std::unique_ptr<Texture> LoadFile(const std::string& filename);
+    static Texture* LoadFile(const std::string& filename);
 public:
     [[nodiscard]] unsigned int GetID() const { return m_id; }
 private: